Ok guys I've been shooting for a long time but 250 yards max. Mostly stuff with minimal holdover. I want to step it up to the next level of 600 or 700 yards. I Already have the gun picked out but I nothing about exactly how to do LR stuff. Main question is I have the tools to get ballistics an I plan to go with a Nikon scope, not sure which one though. But anyway the question is the zeroing itself. I zero at 100 an use my ballistics info to know how many minutes I must go up or down but how do I know how to return to zero or where it's at. Is it just a simple matter of counting clicks or am I way off